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Nemati S, Zavvari-Oskuye Z, Bafadam S, Mokhtari B, Badalzadeh R, Vakili A. Impact of combined alpha-lipoic acid and mitoquinone supplementation on myocardial infarction in aged rats: Heart performance and molecular mechanisms. Exp Gerontol 2024; 189:112402. [PMID: 38484905 DOI: 10.1016/j.exger.2024.112402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 01/16/2024] [Accepted: 03/11/2024] [Indexed: 03/22/2024]
Abstract
BACKGROUND This study aimed to investigate the effects of combined alpha-lipoic acid (ALA) and mitoquinone (Mito Q) supplementation on cardiac function and the underlying mechanisms in aged rats with myocardial infarction (MI). METHODS The aged rats underwent left anterior descending artery (LADA) occlusion for 30 min, followed by reperfusion for 24 h. ALA (100 mg/kg, gavage) and Mito Q (10 mg/kg, IP) were administered daily for two weeks before ischemia. Cardiac function, inflammatory, and apoptotic markers were evaluated 24 h after ischemia. RESULTS The results of this study indicated that the administration of the combination of ALA and Mito Q significantly improved cardiac function. This improvement was linked to a reduction in the expression of pro-inflammatory cytokines TNF-α, IL-6, and IL-1β (P < 0.001) and apoptotic markers (Bax, caspase-3, and Cyt-c), as well as a decrease in the percentage of TUNEL-positive cells (P < 0.001). CONCLUSION The study revealed that combined intervention synergistically mitigated cardiac dysfunction by suppressing inflammatory and apoptotic pathways in aged rats with MI. Further research is needed to validate the potential of ALA and Mito Q as therapeutic options for elderly people at risk of heart attacks.
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Affiliation(s)
- Samira Nemati
- Research Center of Physiology, Semnan University of Medical Sciences, Iran
| | - Zohreh Zavvari-Oskuye
- Drug Applied Research Center, Tabriz University of Medical Sciences, Iran; Student Research Committee, Tabriz University of Medical Sciences, Iran
| | - Soleyman Bafadam
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Iran; Department of Physiology, Faculty of Medicine, Tabriz University of Medical Sciences, Iran; Student Research Committee, Tabriz University of Medical Sciences, Iran
| | - Behnaz Mokhtari
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Iran; Department of Physiology, Faculty of Medicine, Tabriz University of Medical Sciences, Iran
| | - Reza Badalzadeh
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Iran; Department of Physiology, Faculty of Medicine, Tabriz University of Medical Sciences, Iran
| | - Abedin Vakili
- Research Center of Physiology, Semnan University of Medical Sciences, Iran.
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Cheriki M, Habibian M, Moosavi SJ. Curcumin attenuates brain aging by reducing apoptosis and oxidative stress. Metab Brain Dis 2024:10.1007/s11011-023-01326-z. [PMID: 38687459 DOI: 10.1007/s11011-023-01326-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 11/17/2023] [Indexed: 05/02/2024]
Abstract
Brain aging is a physiological event, and oxidative stress and apoptosis are involved in the natural aging process of the brain. Curcumin is a natural antioxidant with potent anti-aging and neuroprotective properties. Therefore, we investigated the protective effects of curcumin on brain apoptosis and oxidative stress, brain-derived neurotrophic factor (BDNF), and vascular endothelial growth factor (VEGF) in aged rats. Old female Wistar rats were randomly divided into three groups (n = 7); as follows: (1) control; (2); saline and (3) curcumin (received 30 mg/kg of curcumin, 5 days/week for 8 weeks, intraperitoneally). Our results indicated that treatment with curcumin in aged rats attenuates brain lipid peroxidation, which was accompanied by a significant increase in the BDNF, VEGF, superoxide dismutase (SOD) activity, and anti-apoptotic protein BCl-2. No significant change in brain anti-apoptotic Bax protein levels was observed after curcumin treatment. The study indicates that curcumin could alleviate brain aging which may be due to attenuating oxidative stress, inhibiting apoptosis, and up-regulating SOD activity, which in turn enhances VEGF and BDNF. Therefore, curcumin has potential therapeutic value in the treatment of neurological apoptosis, neurogenesis, and angiogenesis changes caused by brain aging.
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Affiliation(s)
- Mehran Cheriki
- Department of Physical Education and Sports Sciences, Qaemshahar Branch, Islamic Azad University, Qaemshahar, Iran
| | - Masoumeh Habibian
- Department of Physical Education and Sports Sciences, Qaemshahar Branch, Islamic Azad University, Qaemshahar, Iran.
| | - Seyyed Jafar Moosavi
- Department of Physical Education and Sports Sciences, Qaemshahar Branch, Islamic Azad University, Qaemshahar, Iran
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Elgizawy EI, Amer GS, Ali EA, Alqalashy FS, Ibrahim MM, Latif AAA, Shaban AM. Comparing the efficacy of concomitant treatment of resistance exercise and creatine monohydrate versus multiple individual therapies in age related sarcopenia. Sci Rep 2024; 14:9798. [PMID: 38684784 PMCID: PMC11058861 DOI: 10.1038/s41598-024-59884-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 04/16/2024] [Indexed: 05/02/2024] Open
Abstract
Aging-related sarcopenia is a degenerative loss of strength and skeletal muscle mass that impairs quality of life. Evaluating NUDT3 gene and myogenin expression as new diagnostic tools in sarcopenia. Also, comparing the concomitant treatment of resistance exercise (EX) and creatine monohydrate (CrM) versus single therapy by EX, coenzyme Q10 (CoQ10), and CrM using aged rats. Sixty male rats were equally divided into groups. The control group, aging group, EX-treated group, the CoQ10 group were administered (500 mg/kg) of CoQ10, the CrM group supplied (0.3 mg/kg of CrM), and a group of CrM concomitant with resistance exercise. Serum lipid profiles, certain antioxidant markers, electromyography (EMG), nudix hydrolase 3 (NUDT3) expression, creatine kinase (CK), and sarcopenic index markers were measured after 12 weeks. The gastrocnemius muscle was stained with hematoxylin-eosin (H&E) and myogenin. The EX-CrM combination showed significant improvement in serum lipid profile, antioxidant markers, EMG, NUDT3 gene, myogenin expression, CK, and sarcopenic index markers from other groups. The NUDT3 gene and myogenin expression have proven efficient as diagnostic tools for sarcopenia. Concomitant treatment of CrM and EX is preferable to individual therapy because it reduces inflammation, improves the lipid serum profile, promotes muscle regeneration, and thus has the potential to improve sarcopenia.
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Affiliation(s)
- Eman I Elgizawy
- Medical Physiology Department, Faculty of Medicine, Menoufia University, Yassin Abd El Ghafar St., Shebin El Kom, Menoufia, 32511, Egypt.
| | - Ghada S Amer
- Medical Physiology Department, Faculty of Medicine, Menoufia University, Yassin Abd El Ghafar St., Shebin El Kom, Menoufia, 32511, Egypt
| | - Eman A Ali
- Clinical Pharmacology Department, Faculty of Medicine, Menoufia University, Shebin El Kom, Menoufia, Egypt
| | - Fatma S Alqalashy
- Pathology Department, Faculty of Medicine, Menoufia University, Shebin El Kom, Menoufia, Egypt
| | - Marwa M Ibrahim
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Menoufia University, Shebin El Kom, Menoufia, Egypt
| | - Asmaa A Abdel Latif
- Public Health and Community Medicine Department, Faculty of Medicine, Menoufia University, Shebin El Kom, Menoufia, Egypt
| | - Anwar M Shaban
- Medical Physiology Department, Faculty of Medicine, Menoufia University, Yassin Abd El Ghafar St., Shebin El Kom, Menoufia, 32511, Egypt
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Xie X, Zhang X, Li S, Du W. Involvement of Fgf2-mediated tau protein phosphorylation in cognitive deficits induced by sevoflurane in aged rats. Mol Med 2024; 30:39. [PMID: 38493090 PMCID: PMC10943822 DOI: 10.1186/s10020-024-00784-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/11/2024] [Indexed: 03/18/2024] Open
Abstract
OBJECTIVE Anesthetics have been linked to cognitive alterations, particularly in the elderly. The current research delineates how Fibroblast Growth Factor 2 (Fgf2) modulates tau protein phosphorylation, contributing to cognitive impairments in aged rats upon sevoflurane administration. METHODS Rats aged 3, 12, and 18 months were subjected to a 2.5% sevoflurane exposure to form a neurotoxicity model. Cognitive performance was gauged, and the GEO database was employed to identify differentially expressed genes (DEGs) in the 18-month-old cohort post sevoflurane exposure. Bioinformatics tools, inclusive of STRING and GeneCards, facilitated detailed analysis. Experimental validations, both in vivo and in vitro, examined Fgf2's effect on tau phosphorylation. RESULTS Sevoflurane notably altered cognitive behavior in older rats. Out of 128 DEGs discerned, Fgf2 stood out as instrumental in regulating tau protein phosphorylation. Sevoflurane exposure spiked Fgf2 expression in cortical neurons, intensifying tau phosphorylation via the PI3K/AKT/Gsk3b trajectory. Diminishing Fgf2 expression correspondingly curtailed tau phosphorylation, neurofibrillary tangles, and enhanced cognitive capacities in aged rats. CONCLUSION Sevoflurane elicits a surge in Fgf2 expression in aging rats, directing tau protein phosphorylation through the PI3K/AKT/Gsk3b route, instigating cognitive aberrations.
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Affiliation(s)
- Xin Xie
- Department of Anesthesiology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, No. 44, Xiaoheyan Road, Dandong District, Liaoning Province, Shenyang, 110042, P. R. China
| | - Xiaomin Zhang
- Department of Anesthesiology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, No. 44, Xiaoheyan Road, Dandong District, Liaoning Province, Shenyang, 110042, P. R. China
| | - Songze Li
- Department of Anesthesiology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, No. 44, Xiaoheyan Road, Dandong District, Liaoning Province, Shenyang, 110042, P. R. China
| | - Wei Du
- Department of Anesthesiology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, No. 44, Xiaoheyan Road, Dandong District, Liaoning Province, Shenyang, 110042, P. R. China.
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Aguiar RP, Soares LM, Varney M, Newman-Tancredi A A, Milani H, Prickaerts J, de Oliveira RMW. NLX-101, a 5-HT 1A receptor-biased agonist, improves pattern separation and stimulates neuroplasticity in aged rats. Neurobiol Aging 2023; 124:52-59. [PMID: 36739621 DOI: 10.1016/j.neurobiolaging.2022.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/02/2023]
Abstract
5-HT1A serotonin receptors may play a role in cognitive function changes related to advanced age. Here, we investigated the effects of acute and repeated treatment with NLX-101 (F15599), a postsynaptic 5-HT1A receptor-biased agonist, and F13714, a presynaptic 5-HT1A receptor-biased agonist on spatial object pattern separation (OPS) in aged (22-24 months) rats. Neuroplasticity markers including brain-derived neurotrophic factor, PSD95, synaptophysin, and doublecortin were evaluated in the hippocampus. Unlike younger rats, aged rats were incapable of discriminating any new position of the objects in the arena, reflecting the detrimental effect of aging on pattern separation. However, aged animals treated with NLX-101 showed a significant cognitive improvement in the OPS test, accompanied by increases in hippocampal brain-derived neurotrophic factor and PSD95 protein levels. In contrast, no improvement in OPS performance was observed when aged rats received F13714. Both F13714 and NLX-101 increased the number of newborn neurons in the hippocampi of aged rats. These findings provide a rationale for targeting post-synaptic 5-HT1A as a treatment for cognitive deficits related to aging.
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Affiliation(s)
- Rafael Pazinatto Aguiar
- Department of Pharmacology and Therapeutics, State University of Maringá, Maringá, Paraná, Brazil
| | - Lígia Mendes Soares
- Department of Pharmacology and Therapeutics, State University of Maringá, Maringá, Paraná, Brazil
| | | | | | - Humberto Milani
- Department of Pharmacology and Therapeutics, State University of Maringá, Maringá, Paraná, Brazil
| | - Jos Prickaerts
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Maastricht, the Netherlands
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Chang P, Su Y, Gong D, Kang Y, Liu J, Zhang Y, Zhang WS. The preclinical pharmacological study of a novel intravenous anesthetic, ET-26 hydrochloride, in aged rats. PeerJ 2022; 10:e13995. [PMID: 36196398 PMCID: PMC9527020 DOI: 10.7717/peerj.13995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/12/2022] [Indexed: 01/19/2023] Open
Abstract
Background ET-26 hydrochloride (ET-26HCl) is a novel analogue of etomidate approved for clinical trials. However, all results from recent studies were accomplished in young adult animals. The objective of this study was to evaluate the efficacy and safety of ET-26HCl in aged rats. Methods Aged Sprague-Dawley rats were randomly divided into three groups (three males and three females in each group) were given dose of two-fold of median effective dose (ED50) of ET-26HCl, etomidate and propofol: the measurements of loss of the righting reflex (LORR) and cardiovascular and respiratory function after injection at the two-fold dose of the median effective dose were used for evaluation of effectiveness and safety, and the modified adrenocorticotropic hormone-stimulation experiment was used to evaluate the inhibition effect of the drugs on the synthesis of adrenal cortical hormones. Results There was no significant difference in the onset time among propofol, etomidate and ET-26HCl. The duration of propofol (850.5 ± 77.4 s) was significantly longer than that caused by etomidate (489.8 ± 77.0 s, p = 0.007) and ET-26HCl (347.3 ± 49.0 s, p = 0.0004). No significant difference was observed in the time to stand and normal activity among drugs. A total of 66.7% of rats in the ET-26HCl group were evaluated to have mild hematuria. Then, etomidate and ET-26HCl had a milder blood pressure inhibition effect than propofol. Apnea was observed in all rats administered propofol and the duration for this side effect was 45.0 ± 9.0 s. For etomidate and ET-26HCl, no apnea was observed. No other clinical signs of side-effect were observed, and no rats died. No significant difference was observed in corticosterone concentrations between ET-26HCl and solvent group. However, rats administered etomidate had lower corticosterone concentrations than those administered ET-26HCl at 15, 30, and 60 min. Conclusions Our results indicate ET-26HCl in aged rats is an effective sedative-hypnotic with stable myocardial and respiratory performance and also have mild adrenocortical suppression. Thus, these findings increase the potential for the clinical use of ET-26HCl in the elderly population.
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Affiliation(s)
- Pan Chang
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - YongWei Su
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - DeYing Gong
- Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, China,National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Yi Kang
- Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, China,National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Jin Liu
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China,Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, China,National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - YuJun Zhang
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China,Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, China,National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
| | - Wen-sheng Zhang
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China,Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu, China,National-Local Joint Engineering Research Center of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China
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Huang H, Zhu Y, Zhang Y, Hou B, Zhang Q, Shi X, Min J. Dexmedetomidine suppresses the isoflurane-induced neurological damage by upregulating Heme Oxygenase-1 via activation of the mitogen-activated protein kinase kinase 1/extracellular regulated protein kinases 1/nuclear factor erythroid 2-related factor 2 axis in aged rats. Chem Biol Interact 2022; 367:110114. [PMID: 36027947 DOI: 10.1016/j.cbi.2022.110114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 11/26/2022]
Abstract
Dexmedetomidine (DEX) displays a neuroprotective role in aged rats with isoflurane (ISO)-induced cognitive impairment through antioxidant, and anti-inflammatory, and anti-apoptotic effects. Therefore, the present study was performed to define the molecular mechanism of DEX on ISO-induced neurological impairment in aged rats in relation to the MEK1/ERK1/Nrf2/HO-1 axis. The study enrolled elderly patients undergoing ISO anesthesia. Patient cognitive function following treatment with DEX was evaluated using mini-mental state examination (MMSE). The results revealed that DEX supplementation of anesthesia contributed to higher MMSE scores in patients one week post treatment. Rat model of neurological impairment was also induced in 18-month-age Wistar rats by ISO, followed by DEX treatment. Based on the results of Morris water maze experiment, ELISA, and TUNEL and hematoxylin-eosin staining, in vivo experiments confirmed that DEX could reduce the oxidative stress and neurological damage induced by ISO in rats. DEX activated the nuclear factor erythroid 2-related factor (Nrf2)/Heme Oxygenase 1 (HO-1) pathway. DEX upregulated the expression of Nrf2 and HO-1 by activating the MEK1/ERK1 pathway, whereby attenuating the ISO-caused oxidative stress and neurological damage in rats. Collectively, DEX suppresses the ISO-induced neurological impairment in the aged rats by promoting HO-1 through activation of the MEK1/ERK1/Nrf2 axis.
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Affiliation(s)
- Haijin Huang
- Department of Anesthesiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, PR China
| | - Yunsheng Zhu
- Department of Anesthesiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, PR China
| | - Yang Zhang
- Department of Anesthesiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, PR China
| | - Benchao Hou
- Department of Anesthesiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, PR China
| | - Qin Zhang
- Department of Anesthesiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, PR China
| | - Xiaoyun Shi
- Department of Anesthesiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, PR China
| | - Jia Min
- Department of Anesthesiology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, PR China.
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Kadil Y, Filali H. Nigella Fixed Oil mitigates memory impairment in a rat aged model of cognitive decline, a pivotal role of BDNF and CREB signaling pathways in the hippocampus. CNS Neurol Disord Drug Targets 2022; 21:CNSNDDT-EPUB-124050. [PMID: 35638539 DOI: 10.2174/1871527321666220530093927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 03/12/2022] [Accepted: 04/04/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Nigella is a plant widely used as a natural remedy, recent studies are being focused on the evaluation of its central effects. In this sense, the aim of this research is to explore the effects of the fixed oil of Nigella on cognitive decline in rats. METHODS Behavioral evaluation was performed via a battery of tests, then quantification of Brain Derived Neurotrophic Factor and Cyclic AMP Response Element-Binding protein, mRNA in the hippocampus using RT PCR. RESULTS The results indicated that the fixed oil of black cumin had no effect on spatial memory, whereas the treatment with black cumin induced an overexpression of BDNF, while the variability of CREB levels was not significant. CONCLUSION This is the unique study conducted to so far, and we may conclude that Nigella fixed oil seems to have a therapeutic effect on cognitive decline.
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Affiliation(s)
- Youness Kadil
- Laboratory of Pharmacology-Toxicology, Faculty of Medicine and Pharmacy of Casablanca, Hassan II University of Casablanca, Morocco
| | - Houda Filali
- Laboratory of Pharmacology-Toxicology, Faculty of Medicine and Pharmacy of Casablanca, Hassan II University of Casablanca, Morocco
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Zakrzewska-Sito A, Bieńkowski P, Kołaczkowski M, Nalepa I, Zelek-Molik A, Bielawski A, Chorążka K, Kuczyńska J, Mierzejewski P. Spontaneous head twitches in aged rats: behavioral and molecular study. Psychopharmacology (Berl) 2022; 239:3847-57. [PMID: 36278982 DOI: 10.1007/s00213-022-06253-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 10/03/2022] [Indexed: 10/31/2022]
Abstract
RATIONALE We have discovered that rats at the age of 18 months begin to twitch their heads spontaneously (spontaneous head twitching, SHT). To date, no one has described this phenomenon. OBJECTIVES The purpose of this study was to characterize SHT pharmacologically and to assess some possible mechanisms underlying SHT. METHODS Wistar male rats were used in the study. Animals at the age of 18 months were qualified as HSHT (SHT ≥ 7/10 min observations) or LSHT (SHT < 7/10 min observations). Quantitative real-time PCR with TaqMan low-density array (TLDA) approach was adopted to assess the mRNA expression of selected genes in rat's hippocampus. RESULTS HSHT rats did not differ from LSHT rats in terms of survival time, general health and behavior, water intake, and spontaneous locomotor activity. 2,5-dimethoxy-4-iodoamphetamine (DOI) at a dose of 2.5 mg/kg increased the SHT in HSHT and LSHT rats, while ketanserin dose-dependently abolished the SHT in the HSHT rats. The SHT was reduced or abolished by olanzapine, clozapine, risperidone, and pimavanserin. All these drugs have strong 5-HT2A receptor-inhibiting properties. Haloperidol and amisulpride, as antipsychotic drugs with a mostly dopaminergic mechanism of action, did not influence SHT. Similarly, escitalopram did not affect SHT. An in-depth gene expression analysis did not reveal significant differences between the HSHT and the LSHT rats. CONCLUSIONS SHT appears in some aging rats (about 50%) and is permanent over time and specific to individuals. The 5-HT2A receptor strongly controls SHT. HSHT animals can be a useful animal model for studying 5-HT2A receptor ligands.
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Xu L, Ma F, Leung FKL, Qin C, Lu WW, Tang B. Chitosan-strontium chondroitin sulfate scaffolds for reconstruction of bone defects in aged rats. Carbohydr Polym 2021; 273:118532. [PMID: 34560945 DOI: 10.1016/j.carbpol.2021.118532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/14/2021] [Accepted: 07/30/2021] [Indexed: 12/20/2022]
Abstract
Bone defects caused by trauma have become increasingly common in aged populations. Clinically, because of the relatively decreased bone healing capacity compared with the youth adults, bone defect repair in the elderly remains challenging. The development of effective biomaterials targeted at bone defects in the elderly is a key component of bone-tissue engineering strategies. However, little attention has been paid to bone regeneration in the elderly. Here, we developed a new scaffold chitosan-Strontium chondroitin sulfate (CH-SrCS) and evaluated its effect on improving bone regeneration. We find that the CH-SrCS scaffold displayed positive effects on downregulation of inflammation and osteoclastogenesis related mRNA expressions while demonstrating a significant increase in the expression level of BMP2. Finally, we show that the bone defects healing effects as assessed using an aged rats' bone defects model. Ultimately, this work also provides insights into the design of effective biomaterials targeted at bone defects in the elderly.
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Affiliation(s)
- Lei Xu
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, PR China; Department of Orthopeadics and Traumatology, LKS Faculty of Medicine, the University of Hong Kong, HK SAR, PR China; Department of Orthopeadics and Traumatology, Guangdong Second Provincial General Hospital, Guangzhou 510317, PR China
| | - Fenbo Ma
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, PR China
| | - Frankie K L Leung
- Department of Orthopeadics and Traumatology, LKS Faculty of Medicine, the University of Hong Kong, HK SAR, PR China
| | - Chenghe Qin
- Department of Orthopeadics and Traumatology, Guangdong Second Provincial General Hospital, Guangzhou 510317, PR China.
| | - William W Lu
- Department of Orthopeadics and Traumatology, LKS Faculty of Medicine, the University of Hong Kong, HK SAR, PR China.
| | - Bin Tang
- Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, PR China; Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, PR China; Shenzhen Key Laboratory of Cell Microenvironment, PR China.
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Ma S, Wang N, Zhang P, Wu W, Fu L. Fecal microbiota transplantation mitigates bone loss by improving gut microbiome composition and gut barrier function in aged rats. PeerJ 2021; 9:e12293. [PMID: 34721980 PMCID: PMC8542369 DOI: 10.7717/peerj.12293] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 09/21/2021] [Indexed: 12/19/2022] Open
Abstract
Background Gut microbiota (GM) dysbiosis is closely related to bone loss and the occurrence of osteoporosis in animals and human. However, little is known about the effect and the mechanisms of fecal microbiota transplantation (FMT) on bone in the treatment of senile osteoporosis. Methods Aged female rats were randomly divided into the FMT group and the control group. 3-month-old female rats were used as fecal donors. The rats were sacrificed at 12 and 24 weeks following transplantation and the serum, intestine, bone, and feces were collected for subsequent analyses. Results The bone turnover markers of osteocalcin, procollagen type 1 N-terminal propeptide (P1NP), and carboxy-terminal peptide (CTX) decreased significantly at 12 and 24 weeks following FMT (P < 0.05). At 12 weeks following transplantation, histomorphometric parameters including the bone volume (BV), trabecular bone volume fraction (BV/TV), trabecular number (Tb.N), and trabecular thickness (Tb.Th) of the FMT group were comparable to the control group. However, at 24 weeks following transplantation, these parameters of the FMT group were significantly higher than those of the control group (P < 0.05). Besides, the GM aggregated at 12 and 24 weeks following FMT, and the ecological distance was close between the rats in the FMT group and the donor rats. Alpha diversity, shown by the Shannon index and Simpson index, and the Firmicutes/Bacteroidetes ratio decreased significantly after FMT at 24 weeks. Furthermore, FMT restored the GM composition in aged rats at the phylum and family level, and the intestinal microbiota of the aged rats was similar to that of the donor rats. Correlation network analysis indirectly suggested the causality of FMT on alleviating osteoporosis. FMT improved the intestinal structure and up-regulated the expression of tight junction proteins of occludin, claudin, and ZO-1, which might be associated with the protective effects of FMT on bone. Conclusions GM transplanted from young rats alleviated bone loss in aged rats with senile osteoporosis by improving gut microbiome composition and intestinal barrier function. These data might provide a scientific basis for future clinical treatment of osteoporosis through FMT.
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Affiliation(s)
- Sicong Ma
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ning Wang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Pu Zhang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wen Wu
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lingjie Fu
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Torres ML, Wanionok NE, McCarthy AD, Morel GR, Fernández JM. Systemic oxidative stress in old rats is associated with both osteoporosis and cognitive impairment. Exp Gerontol 2021; 156:111596. [PMID: 34678425 DOI: 10.1016/j.exger.2021.111596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/25/2021] [Accepted: 10/14/2021] [Indexed: 10/20/2022]
Abstract
Aging is associated both with an increase in memory loss and with comorbidities such as Osteoporosis, which could be causatively linked. In the present study, a deleterious effect on bone is demonstrated for the first time in a model of aged rats with impaired memory. We show that bone marrow progenitor cells obtained from rats with memory deficit have a decrease in their osteogenic capacity, and an increase both in their osteoclastogenic profile and adipogenic capacity, when compared to aged rats with preserved memory. Rats with impaired (versus preserved) memory also show alterations in long-bone micro-architecture (decreased trabecular bone and osteocyte density, increased TRAP-positive osteoclasts), lower bone quality (decreased trabecular bone mineral content and density) and an increase in bone marrow adiposity. Interestingly, the development of bone alterations and memory deficit in old rats is associated with significantly higher levels of serum oxidative stress (versus unaffected aged rats). In conclusion, we have found for the first time in an aged rat model, a relationship between alterations in bone quality and memory impairment, with increased systemic oxidative stress as a possible unifying mechanism.
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Affiliation(s)
- María Luz Torres
- LIOMM (Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CIC, Calle 47 y 115, 1900 La Plata, Argentina
| | - Nahuel Ezequiel Wanionok
- LIOMM (Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CIC, Calle 47 y 115, 1900 La Plata, Argentina
| | - Antonio Desmond McCarthy
- LIOMM (Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CIC, Calle 47 y 115, 1900 La Plata, Argentina
| | - Gustavo Ramón Morel
- Biochemistry Research Institute of La Plata "Professor Doctor Rodolfo R. Brenner" (INIBIOLP), Argentina
| | - Juan Manuel Fernández
- LIOMM (Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CIC, Calle 47 y 115, 1900 La Plata, Argentina.
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Yan H, Zhao H, Kang Y, Ji X, Zhang T, Wang Y, Cui R, Zhang G, Shi G. Parecoxib alleviates the motor behavioral decline of aged rats by ameliorating mitochondrial dysfunction in the substantia nigra via COX-2/PGE2 pathway inhibition. Neuropharmacology 2021; 194:108627. [PMID: 34089729 DOI: 10.1016/j.neuropharm.2021.108627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 05/15/2021] [Accepted: 05/19/2021] [Indexed: 12/17/2022]
Abstract
Mitochondrial dysfunction manifests as an early event in the substantia nigra (SN) in aging and Parkinson disease. Cyclooxygenase 2 (COX-2), the rate-limiting enzyme in the prostaglandin E2 (PGE2) synthesis pathway, is implicated in aging and age-related neurodegenerative diseases; moreover, inhibition of COX-2 expression has been shown to be neuroprotective for nigrostriatal dopaminergic neurons. However, it is not known whether the neuroprotective effect of COX-2 inhibition is related to improved mitochondrial function during the aging process. To this end, we explored the effects of the selective COX-2 inhibitor parecoxib on mitochondrial function in the SN of aged rats. We found that parecoxib administration to aged rats for 10 weeks decreased COX-2/PGE2 expression, increased tyrosine hydroxylase and dopamine transporter expression in nigrostriatal dopaminergic neurons, and alleviated motor behavioral decline. Decreased malondialdehyde levels and an increased GSH/GSSG ratio as well as enhanced enzymatic activities of catalase and manganese superoxide dismutase in parecoxib-treated aged rats indicate that parecoxib administration elevated antioxidative ability in the SN during the aging process. Parecoxib treatment to aged rats promoted mitochondrial biogenesis by upregulating PGC-1α/NRF-1/TFAM, enhancing mitochondrial fusion by decreasing Drp1 levels and increasing Mfn1 and OPA1 levels, and activated mitophagy by increasing PINK1/Parkin levels while reducing p62/SQSTM1 levels, thereby coordinating mitochondrial homeostasis via inhibiting the COX-2/PGE2 pathway. Thus, our results strongly support the conclusion that parecoxib treatment is conducive to improving mitochondrial dysfunction in the SN upon aging in rats.
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Sokolov OY, Prokhorova TA, Tereshkina EB, Zozulya SA, Simonov AN, Kost NV, Dadayan AK, Bogachouk AP, Zolotarev YA. Neurotropic peptide HLDF-6-amide reduces age-related decline in sexual activity in old male rats. Exp Gerontol 2021; 149:111329. [PMID: 33785397 DOI: 10.1016/j.exger.2021.111329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/06/2021] [Accepted: 03/22/2021] [Indexed: 11/16/2022]
Abstract
Aging is associated with a decline in the erectile capacity and sexual motivation. Emerging new therapy for the treatment of these age-related pathologies in men is the use of the regulatory peptides. We validated the use of HLDF-6-amide (Thr-Gly-Glu-Hse-His-Arg-NH2) as a potential modulator of sexual performance in aged male rats. Behavioral tests, including the standard parameters of sexual behavior, were performed longitudinally at 20 and 26 months of age. The effects of HLDF-6-amide administered daily at 300 μg/kg for 3 week on the levels of sex hormones and the activity of antioxidant enzymes and indicators of inflammation were evaluated. HLDF-6-amide administration increased the copulative activity of the 20-month-old male rats. This effect of HLDF-6-amide was more pronounced in the 26-month-old rats. Although HLDF-6-amide did not have the effect on the levels of circulating testosterone and estradiol, it reduced the activity of leukocyte elastase and glutathione-S-peroxidase, suggesting that the peptide has anti-inflammatory and antioxidant properties. Therefore, this study shows that HLDF-6-amide has the positive impact on sexual activity in this rodent model, representing a new therapeutic approach for improving sexual performance in older men.
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Affiliation(s)
| | | | | | - S A Zozulya
- Mental Health Research Center, Moscow, Russia
| | - A N Simonov
- Mental Health Research Center, Moscow, Russia
| | - N V Kost
- Mental Health Research Center, Moscow, Russia
| | - A K Dadayan
- Institute of Molecular Genetics of National Research Center "Kurchatov Institute", Moscow, Russia
| | - A P Bogachouk
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Moscow, Russia
| | - Yu A Zolotarev
- Institute of Molecular Genetics of National Research Center "Kurchatov Institute", Moscow, Russia
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Zhang Y, Sun Q, Fan A, Dong G. Isoflurane triggers the acute cognitive impairment of aged rats by damaging hippocampal neurons via the NR2B/CaMKII/CREB pathway. Behav Brain Res 2021; 405:113202. [PMID: 33636236 DOI: 10.1016/j.bbr.2021.113202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/02/2021] [Accepted: 02/18/2021] [Indexed: 11/18/2022]
Abstract
Isoflurane was responsible for acute neuronal impairment, but its potential molecular mechanisms in damaging hippocampal neurons had not been clearly understood. This study aimed to explore the underlying mechanism of how isoflurane affected the cognitive function of aged rats by damaging the hippocampal neurons. Acute cognitive impairment was found in aged Wistar rats via Morris water maze test and Y-maze test after isoflurane anesthesia in a dose-dependent manner compared with the control group in vivo. Isoflurane also decreased the viabilities and strengthened the apoptotic potential of hippocampal neurons by damaging the mitochondria in a time-dependent manner compared with the control group which was reported by MTT, immunofluorescent assay, flow cytometry and western blot assay in vitro. Isoflurane jeopardized hippocampal neurons by directly inactivating the NR2B/CaMKII/CREB pathway and its harmful effects could be ameliorated by adding CaMKII activator CdCl2. These findings provided evidence that the cognitive ability of aged rats was injured by isoflurane exposure and isoflurane also inhibited the viability and enhanced the apoptosis of hippocampal neurons by damaging the mitochondria through inhibition of the NR2B/CaMKII/CREB pathway and its harmful roles could be partially ameliorated by CdCl2. Our study demonstrated that isoflurane could cause acute neuronal damage and we provided fresh insights that contributed to the safe use of anesthetic agents and the prevention of PND in elderly people.
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Affiliation(s)
- Yuangui Zhang
- Department of Anesthesiology, Weifang People's Hospital, No. 151, Guangwen Street, Kuiwen District, Weifang City, Shandong Province, 261000, China
| | - Qingqing Sun
- Department of Anesthesiology, Weifang People's Hospital, No. 151, Guangwen Street, Kuiwen District, Weifang City, Shandong Province, 261000, China
| | - Aixia Fan
- Department of Anesthesiology, Xintai People's Hospital, No. 1329, Xinfu Road, Xintai City, Shandong Province, 271200, China
| | - Guimin Dong
- Department of Anesthesiology, Weifang People's Hospital, No. 151, Guangwen Street, Kuiwen District, Weifang City, Shandong Province, 261000, China.
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Firgany AEL, Sarhan NR. Quercetin mitigates monosodium glutamate-induced excitotoxicity of the spinal cord motoneurons in aged rats via p38 MAPK inhibition. Acta Histochem 2020; 122:151554. [PMID: 32622428 DOI: 10.1016/j.acthis.2020.151554] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/19/2020] [Accepted: 04/22/2020] [Indexed: 12/18/2022]
Abstract
Various studies reported the possibility of deterioration of blood-brain barrier (BBB) integrity owing to the aging process. The current work was performed to investigate the ability of Monosodium glutamate (MSG) to cross BBB in aged rats, the damage affecting the anterior horn cells of the spinal cord due to excitotoxicity, and the mechanisms by which quercetin (Que) administration might suppress such damage. Forty male rats aged 18 months were assigned equally to 4 groups: control group, Que group (received Que, 20 mg/kg/d intraperitonealy for 10 days), MSG group (received MSG, 4.0 g/kg/d subcutaneously for 10 days), MSG + Que group (received both Que and MSG as done in the Que and MSG groups respectively). Cervical spinal cord specimens were obtained and prepared for routine histological study, immunohistochemical staining by caspase-3 and glial fibrillary acidic protein (GFAP), assessment of oxidative stress, measurement of cytokines, assessment of caspase-3 activity and GFAP levels as well as for western blotting of phosphorylated activating transcription factor 2 (ATF2pp) as an indicator for the activity of p38 mitogen-activated protein kinase (MAPK). The MSG group revealed variable degenerative and apoptotic changes in the motoneurons and neuroglia, a marked rise in the cytoplasmic caspase-3 expression in motoneurons and a significant reduction (p < 0.001) in the astrocyte surface area percentage. In addition, the spinal cord tissue exhibited a significant elevation (p < 0.001) in the levels of malondialdehyde (MDA), IL-1, IL-6, TNFα, INFɣ, caspase-3 activity and ATF2 pp expression as well as a significant reduction (p < 0.001) in SOD, IL-10 and GFAP levels compared with the control group. On combining Que with MSG, most of the degenerative changes were reversed and all the impaired parameters were nearly normalized except for IL-6 and GFAP levels which were still significantly (p < 0.05) different from those of the control group. Our study suggests that MSG can break through the BBB of the aged rats and induce excitotoxicity dependent changes in spinal cord motoneurons. Most of these changes were reversed by Que probably via targeting the p38 MAPK-ATF2 pathway, antagonizing oxidative stress, anti-inflammatory effect, and promoting GFAP expression.
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Tao C, Keep RF, Xi G, Hua Y. CD47 Blocking Antibody Accelerates Hematoma Clearance After Intracerebral Hemorrhage in Aged Rats. Transl Stroke Res 2019; 11:541-551. [PMID: 31664629 DOI: 10.1007/s12975-019-00745-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 02/05/2023]
Abstract
Both experimental studies and surgical clinical trials suggest that hematoma clearance is a therapeutic target in intracerebral hemorrhage (ICH). We have investigated effects of CD47, a "don't eat me" signal expressed on erythrocytes, on hematoma resolution after ICH in young mice. This study expands those findings by examining the effects on a CD47 blocking antibody in aged rats. First, male Fischer 344 rats (18 months old) received an intracaudate injection of 50 μL autologous whole blood or saline. Hematoma features of magnetic resonance imaging (MRI) and neurological deficits were evaluated within 3 days. Second, rats had an intracaudate co-injection of 50 μL autologous blood with either CD47 blocking antibody or IgG. MRI was used to quantify hematoma/iron volume, hemolysis, brain swelling, and atrophy at different time points, behavioral tests to assess neurological deficits, and immunohistochemistry to assess brain injury and neuroinflammation. The CD47 blocking antibody significantly promoted hematoma clearance, attenuated brain swelling, hemolysis, and neuronal loss and increased the number of phagocytic macrophages in and around hematoma 3 days after ICH. Moreover, CD47 blockade reduced neuronal loss, brain atrophy, and neurobehavioral deficits at day 28. These results indicate that a CD47 blocking antibody can accelerate hematoma clearance and alleviate short- and long-term brain injury after ICH in aged rats and that it might be a therapeutic strategy for ICH.
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Affiliation(s)
- Chuanyuan Tao
- Department of Neurosurgery, R5018 BSRB, University of Michigan, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.,Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Richard F Keep
- Department of Neurosurgery, R5018 BSRB, University of Michigan, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA
| | - Guohua Xi
- Department of Neurosurgery, R5018 BSRB, University of Michigan, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA
| | - Ya Hua
- Department of Neurosurgery, R5018 BSRB, University of Michigan, 109 Zina Pitcher Place, Ann Arbor, MI, 48109-2200, USA.
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Metwally Ibrahim SEL, Kosba AA. Royal jelly supplementation reduces skeletal muscle lipotoxicity and insulin resistance in aged obese rats. ACTA ACUST UNITED AC 2018; 25:307-15. [PMID: 29960833 DOI: 10.1016/j.pathophys.2018.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/28/2018] [Accepted: 05/03/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Consumption of a high-fat diet (HFD) in aged rats is associated with several metabolic disorders. The mechanism of skeletal muscle lipotoxicity and insulin resistance (IR) is multi-factorial, but the exact mechanism of how aging affects these processes unknown. Royal jelly (RJ) is a dietary supplement with many physiological and pharmacological properties. No previous studies have demonstrated the protective effects and mechanism of RJ in aged obese rats. OBJECTIVES The study was carried to investigate the effects of aging and HFD on skeletal muscles, and adipose tissue metabolism and inflammation, in aged rats, and whether RJ could combat such adverse effects. METHODOLOGY A total of 40 male rats were divided into5 groups; young rats fed a standard diet, aged rats fed a standard diet, aged rats fed RJ, aged rats fed a HFD, and aged rats fed both a HFD and RJ for 8 weeks. We investigated changes in body weights (BW), abdominal fat weights, total cholesterol, triglycerides (TG), low density lipoprotein-cholesterol (LDL-c), high density lipoprotein-cholesterol (HDL-c), muscle TG, and IR levels. Also, concentrations of TNF-α receptor 1(TNFR1) were estimated in the serum and adipose tissues. RESULTS Aged, obese rats showed increased BW, adipose weights, IR, and disturbed serum and muscle lipids. Also, TNFR1 was increased. Rats fed RJ showed decreased adiposity, improved lipids' profiles, improved IR, and decreased TNFR1. CONCLUSION Aging and HFD were associated with disturbed metabolism, and muscle lipotoxicity and inflammation, while RJ could counteract muscle lipotoxicity in rats and reduce IR, most likely due to an anti-inflammatory effect.
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Abstract
Intake of high-fat/high-sucrose (HFS) diet or high fat diet influences bone metabolism in young rodents, but its effects on bone properties of aged rodents still remain unclear. This study aimed to examine the effects of HFS diet intake on trabecular bone architecture (TBA) and cortical bone geometry (CBG) in aged rats. Fifteen male Wistar rats over 1 year were randomly divided into two groups. One group was fed a standard laboratory diet (SLD) and the other group was fed a HFS diet for six months. The femur/tibia, obtained from both groups at the end of experimental period, were scanned by micro-computed tomography for TBA/CBG analyses. Serum biochemical analyses were also conducted. Body weight was significantly higher in the HFS group than in the SLD group. In both femur and tibia, the HFS group showed higher trabecular/cortical bone mass in reference to bone mineral content, volume bone mineral density and TBA/CBG parameters compared with the SLD group. In addition, serum calcium, inorganic phosphorus, total protein, triacylglycerol, HDL and TRACP-5b levels were significantly higher in the HFS group than in the SLD group. There were good correlations between body weight and bone parameters in the femur and tibia. These results suggest that HFS diet intake results in higher bone mass in aged rats. Such effects of HFS diet intake might have been induced by increased body weight.
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Key Words
- ALP, alkaline phosphatase
- Aged rats
- BMC, bone mineral content
- BMD, bone mineral density
- BV, bone volume
- BV/TV, bone volume fraction
- CBG, cortical bone geometry
- CV, cortical bone volume
- CV/(CV + MV), cortical volume fraction
- Ca, calcium
- Conn.D, connectivity density
- Cortical bone geometry
- Ct.Ar, cortical bone sectional area
- Ct.Th, cortical bone thickness
- DXA, dual-energy X-ray absorptiometry
- Ec.Pm, endocortical perimeter
- HDL, high-density lipoprotein cholesterol
- HFD, high fat diet
- HFS, high-fat/high-sucrose
- High-fat sucrose diet
- IP, inorganic phosphorus
- LDL, low-density lipoprotein cholesterol
- MV, medullary volume
- Micro-computed tomography
- OC, osteocalcin
- Ps.Pm, periosteal perimeter
- SLD, standard laboratory diet
- TBA, trabecular bone architecture
- TBPf, trabecular bone pattern factor
- TC, total cholesterol
- TG, triacylglycerol
- TMD, tissue mineral density
- TP, total protein
- TRACP-5b, tartrate-resistant acid phosphatase-5b
- TV, tissue volume
- Tb.N, trabecular number
- Tb.Sp, trabecular separation
- Tb.Th, trabecular thickness
- Tb.W, trabecular width
- Trabecular bone architecture
- VOI, volume of interest
- micro-CT, x-ray micro-computed tomography
- vBMD, volume BMD
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Affiliation(s)
- Akira Minematsu
- Department of Physical Therapy, Faculty of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Yasue Nishii
- Department of Physical Therapy, Faculty of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Susumu Sakata
- Department of Physiology, Nara Medical University, 840 Shijou-cho, Kashihara, Nara 634-8521, Japan
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Pyrzanowska J, Wawer A, Joniec-Maciejak I, Piechal A, Blecharz-Klin K, Graikou K, Chinou I, Widy-Tyszkiewicz E. Long-term administration of Greek Royal Jelly decreases GABA concentration in the striatum and hypothalamus of naturally aged Wistar male rats. Neurosci Lett 2018; 675:17-22. [PMID: 29578001 DOI: 10.1016/j.neulet.2018.03.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 02/20/2018] [Accepted: 03/16/2018] [Indexed: 11/17/2022]
Abstract
Royal Jelly (RJ) is a unique substance obtained from bees that has been used widely in European and Asian traditional medicine for its potential to prevent signs of aging through its antioxidative, anti-inflammatory, anti-hyperglycemic and anti-hypercholesterolemic properties. We recently reported an enhancement in spatial memory along with changes in monoaminergic transmission in aged rats after chronic RJ administration. Here, we aim to further explore the action of RJ on central nervous system activity by examining levels of amino acids in selected brain structures of aged male Wistar rats following 2-months of Greek RJ administration. RJ powder was previously chemically characterized and given orally (50 or 100 mg of powder/kg b.w./day) by gastric gavage. The concentrations of amino acids (alanine, aspartic acid, gamma-aminobutyric acid, glutamic acid, histidine and taurine) in the brain regions examined (prefrontal cortex, hippocampus, striatum and hypothalamus) were quantified using HPLC. We also examined basic biochemical parameters of renal and hepatic activity, as damage of these organs could potentially explain the changes in brain function and behavior. Upon biochemical examination, a decrease in the concentration of gamma-aminobutyric acid was observed in both the striatum and hypothalamus. Liver and kidney functions were not changed by chronic RJ-administration. Our results provide insight toward understanding the mechanism of action of RJ and its effects on neurotransmission in the central nervous system.
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Affiliation(s)
- Justyna Pyrzanowska
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Centre for Preclinical Research and Technology CePT, Banacha 1B, 02-097, Warsaw, Poland
| | - Adriana Wawer
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Centre for Preclinical Research and Technology CePT, Banacha 1B, 02-097, Warsaw, Poland
| | - Ilona Joniec-Maciejak
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Centre for Preclinical Research and Technology CePT, Banacha 1B, 02-097, Warsaw, Poland
| | - Agnieszka Piechal
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Centre for Preclinical Research and Technology CePT, Banacha 1B, 02-097, Warsaw, Poland.
| | - Kamilla Blecharz-Klin
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Centre for Preclinical Research and Technology CePT, Banacha 1B, 02-097, Warsaw, Poland
| | - Konstantia Graikou
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Zografou, 15771, Athens, Greece
| | - Ioanna Chinou
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Zografou, 15771, Athens, Greece
| | - Ewa Widy-Tyszkiewicz
- Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, Centre for Preclinical Research and Technology CePT, Banacha 1B, 02-097, Warsaw, Poland
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Abstract
Background: P38 mitogen activated protein kinase (MAPK) α modulates microglia-mediated inflammatory responses and a number of neuronal physiological processes. Objective: To evaluate pre-clinically the pharmacological effects in the brain of p38 MAPKα inhibition with a brain-penetrant specific chemical antagonist. Methods: VX-745, a blood-brain barrier penetrant, highly selective p38 MAPKα inhibitor, and clinical stage investigational drug, was utilized. Initially, a pilot study in 26-month-old Tg2576 mice was conducted. Subsequently, a definitive dose-response study was conducted in aged (20–22 months) rats with identified cognitive deficits; n = 15 per group: vehicle, 0.5, 1.5, and 4.5 mg/kg VX-745 by oral gavage twice daily for 3 weeks. Assessments in aged rats included IL-1β, PSD-95, TNFα protein levels in hippocampus; and Morris water maze (MWM) test for cognitive performance. Results: Drug effect could not be assessed in Tg2576 mice, as little inflammation was evident. In cognitively-impaired aged rats, VX-745 led to significantly improved performance in the MWM and significant reduction in hippocampal IL-1β protein levels, though the effects were dissociated as the MWM effect was evident at a lower dose level than that required to lower IL-1β. Drug concentration-effect relationships and predicted human doses were determined. Conclusions: Selective inhibition of p38 MAPKα with VX-745 in aged rats reduces hippocampal IL-1β levels and improves performance in the MWM. As the two effects occur at different dose levels, the behavioral effect appears to be via a mechanism that is independent of reducing cytokine production. The predicted human doses should minimize risks of systemic toxicity.
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Affiliation(s)
- John J. Alam
- Correspondence to: John J. Alam, MD, EIP Pharma, LLC, 11 Channing Street, Cambridge, MA 02138, USA. Tel.: +1 617 909 5737;
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Kong FJ, Ma LL, Zhang HH, Zhou JQ. Alpha 7 nicotinic acetylcholine receptor agonist GTS-21 mitigates isoflurane-induced cognitive impairment in aged rats. J Surg Res 2015; 194:255-61. [PMID: 25450597 DOI: 10.1016/j.jss.2014.09.043] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 09/19/2014] [Accepted: 09/29/2014] [Indexed: 11/22/2022]
Abstract
BACKGROUND Postoperative cognitive dysfunction is increasingly recognized as an important clinical syndrome. Inhalation anesthetics are commonly used during surgery, and it has been proposed that inhalation anesthetics impair cognitive function. However, there are few clinical interventions and treatments available to prevent this disorder. GTS-21, a selective agonist of alpha 7 nicotinic acetylcholine receptor, has been indicated to exert neuroprotective effects in the experimental animal models of neurodegenerative diseases. Therefore, we hypothesized that pretreatment with GTS-21 attenuates isoflurane-induced cognitive decline in aged rats. METHODS In the present study, 20-mo-old rats were administered GTS-21 or an equal volume of saline by intraperitoneal injection 30 min before exposure to isoflurane. Then the rats were exposed to 1.3% isoflurane for 4 h. Spatial learning and memory of the rats were assessed at 2 wk after isoflurane exposure. The expression levels of interleukin (IL)-1β, IL-6, and tumor necrosis factor-α in the hippocampus and cerebral cortex were determined by enzyme-linked immunosorbent assay. Simultaneously, neuronal apoptosis in the hippocampus was also observed by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining and Nissl staining. RESULTS We found that exposure to isoflurane induces learning and memory deficits of old rats. IL-1β in the hippocampus was increased at 4 h after isoflurane exposure. Isoflurane also increased neuroapoptosis in the hippocampus and decreased neuronal density in the CA1 region. And GTS-21 pretreatment effectively alleviated these changes. CONCLUSIONS The study demonstrated that pretreatment with α7 nicotinic acetylcholine receptor agonist GTS-21 attenuates isoflurane-induced learning and memory impairment in aged rats.
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Abstract
BACKGROUND Ischemic postconditioning (IPoC) is defined as a series of intermittent interruptions of blood flow in the early phase of reperfusion that mechanically alters the hydrodynamics of reperfusion and it attenuates renal damage after ischemia/reperfusion (I/R) injury in vivo. But all of these data had been obtained in adult populations and whether this protection was maintained in aging kidneys was unknown. The objective of this study was to establish whether the efficacy of IPoC is maintained in aging kidneys. MATERIALS AND METHODS The aged (24-month-old) and young (3-month-old) Wistar rats were used. Rats were subjected to 45 min of renal ischemia, both with and without treatment with IPoC. Serum urea nitrogen and creatinine levels, histological examination and apoptosis were assessed at 24 h. Oxidative stress was evaluated and apoptosis-related molecules were studied by Western blotting. RESULTS In young rat kidneys, IPoC significantly attenuated the renal dysfunction and cell apoptosis induced by I/R. In contrast, IPoC failed to limit renal dysfunction, possibly a consequence of increased apoptosis in aged rat kidneys. CONCLUSIONS Our data indicated that IPoC was ineffective in aged rat kidneys. These findings may have major implications in that severe apoptosis in aged kidneys might be refractory to anti-apoptotic effect by IPoC.
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Affiliation(s)
- Hui Chen
- Department of Urology, Renmin Hospital of Wuhan University , Wuhan , China and
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Pyrzanowska J, Piechal A, Blecharz-Klin K, Joniec-Maciejak I, Graikou K, Chinou I, Widy-Tyszkiewicz E. Long-term administration of Greek Royal Jelly improves spatial memory and influences the concentration of brain neurotransmitters in naturally aged Wistar male rats. J Ethnopharmacol 2014; 155:343-351. [PMID: 24882731 DOI: 10.1016/j.jep.2014.05.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 04/17/2014] [Accepted: 05/07/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Royal Jelly (RJ) is a bee-derived product that has been traditionally used in the European and Asian systems of medicine for longevity. RJ has various pharmacological activities that may prevent aging e.g., anti-inflammatory, anti-oxidative, anti-hypercholesterolemic and anti-hyperglycemic properties. AIM OF THE STUDY To evaluate the behavioral and neurochemical effects of long-term oral, previously chemically analyzed, Greek RJ administration to aged rats. MATERIALS AND METHODS RJ powder was given to 18-month old male Wistar rats (50 and 100mg of powder/kg b.w./day) by gastric gavage for 2 months. The spatial memory was assessed in the water maze and next the level of neurotransmitters, their metabolites and utilization in the selected brain regions were estimated. RESULTS The improvement of memory in rats pretreated with the smaller dose of RJ was observed compared with controls. In biochemical examination mainly the depletion of dopamine and serotonin in the prefrontal cortex along with an increase in their metabolite concentration and turnover were seen. CONCLUSION Better cognitive performance in the old animals using a non-toxic, natural food product in the view of the process of the aging of human population is noteworthy. Our results contribute towards validation of the traditional use of RJ in promoting a better quality of life in old age.
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Affiliation(s)
- Justyna Pyrzanowska
- Department of Experimental and Clinical Pharmacology, Medical University, of Warsaw, Banacha 1b, 02-097 Warsaw, Poland
| | - Agnieszka Piechal
- Department of Experimental and Clinical Pharmacology, Medical University, of Warsaw, Banacha 1b, 02-097 Warsaw, Poland
| | - Kamilla Blecharz-Klin
- Department of Experimental and Clinical Pharmacology, Medical University, of Warsaw, Banacha 1b, 02-097 Warsaw, Poland
| | - Ilona Joniec-Maciejak
- Department of Experimental and Clinical Pharmacology, Medical University, of Warsaw, Banacha 1b, 02-097 Warsaw, Poland
| | - Konstantia Graikou
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Zografou, 15771 Athens, Greece
| | - Ioanna Chinou
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Zografou, 15771 Athens, Greece
| | - Ewa Widy-Tyszkiewicz
- Department of Experimental and Clinical Pharmacology, Medical University, of Warsaw, Banacha 1b, 02-097 Warsaw, Poland.
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Abstract
OBJECTIVES The socio-economic impact from age-related mental decline is escalating. Supplementation of functional foods for sustaining mental health is desirable. We examined the effect of long-term supplementation of complex milk lipid concentrate (CMLc), mixed dairy phospholipids, on memory and associated vascular and neuronal changes in aged rats. METHODS Fisher/Norway Brown rats were used. Two groups of aged rats (24 months) were fed with either gelatin-formulated CMLc or blank gelatin as the control, for 4 months. To determine age-related changes, a young group (5 months) was also fed with blank gelatin. Morris water maze tests were carried out after the supplementation and brain tissues were collected for biological analysis. RESULTS The aged control rats learnt to locate the platform slower than the young control rats during acquisition trials (*P < 0.05), and made fewer entries to and more initial heading errors from the platform zone during testing trials (*P < 0.05). The CMLc supplementation improved memory by showing the reduced initial heading errors in a delayed probe trial ((#)P < 0.05). We also found that the aged rats with CMLc supplementation improved vascular density, dopamine output, and neuroplasticity ((#)P < 0.05) in the brain regions involved in memory compared with that of the aged control rats. DISCUSSION The data suggested that the supplementation of CMLc during the early stage of brain aging may prevent memory decline possibly through improving vascular and neuronal function.
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